Single-channel transmission in gold one-atom contacts and chains

Details Single-channel transmission in gold one-atom contacts and chains Single-channel transmission in gold one-atom contacts and chains

2003-03-11

arxiv.org/abs/cond-mat/0303195v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures. To be published in Phys. Rev. B, Rapid Communications (2003)

Scientific paper

10.1103/PhysRevB.67.121407

We induce superconductivity by proximity effect in thin layers of gold and study the number of conduction channels which contribute to the current in one-atom contacts and atomic wires. The atomic contacts and wires are fabricated with a Scanning Tunneling Microscope. The set of transmission probabilities of the conduction channels is obtained from the analysis of the $I(V)$ characteristic curve which is highly non-linear due to multiple Andreev reflections. In agreement with theoretical calculations we find that there is only one channel which is almost completely open.

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